Moisture out one tail pipe, and a bit in oil. any idea?

Sounds like it is just condensation in the mufflers. There is a lot of mosture here where I live at night and in the morning all the cars are wet though there was not a cloud in the sky. Just about every time I start my Dart up it spits out some water and a little black stuff. I think the black stuff is just sut from the pipes as it will dry up and oil would not of evaperated. So I think you are fine. You should run it for a bit each time to get all the water out or it will rust out your mufflers over time.